#product-list {
    padding-right: 0;
}
#product-list ul {}
#product-list ul li {
    padding: 15px;
}

@media screen and (max-width: 640px) {
    #product-list {
        padding: 0 10px;
    }
    #product-list ul {
        margin: 0 -15px;
    }
}
